<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="提交审核" />
    </el-steps>

    <ul class="chanpterList">
      <li v-for="chapter in chapterList" :key="chapter.id">
        <p>
          {{ chapter.title }}
          <span class="acts">
            <el-button type="text" @click="openVideoDialog(chapter.id)">添加课时</el-button>
            <el-button style type="text" @click="editChapter(chapter.id)">编辑</el-button>
            <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
          </span>
        </p>

        <!-- 视频 -->
        <ul class="chanpterList videoList">
          <li v-for="video in chapter.children" :key="video.id">
            <p>
              {{ video.title }}
              <span class="acts">
                <el-button type="text" @click="editVideoDialog(video.id)">编辑</el-button>
                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
              </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>

    <!-- 添加章节按钮 -->
    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>

    <!-- 下一步和上一步 -->
    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节弹出表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title" />
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加小节弹出表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title" />
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right" />
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.isFree">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
         <el-form-item label="视频" v-if="video.id">{{video.videoOriginalName}}</el-form-item>
        <el-form-item label="上传视频">
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo"
          >
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">
                最大支持1G，
                <br />支持3GP、ASF、AVI、DAT、DV、FLV、F4V、
                <br />GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、
                <br />MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、
                <br />SWF、TS、VOB、WMV、WEBM 等视频格式上传
              </div>
              <i class="el-icon-question" />
            </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import chapterApi from "@/api/edu/chapter";
import videoApi from "@/api/edu/video";
export default {
  data() {
    return {
      //==============小节数据================//
      fileList: [],//上传文件列表
      BASE_API: process.env.BASE_API, // 接口API地址
      chapterId: "",
      saveVideoBtnDisabled: false,
      dialogVideoFormVisible: false,
      video: {},
      //===========章节数据================//
      dialogVideoFormVisible: false,
      dialogChapterFormVisible: false,
      courseId: "",
      chapter: {},
      chapterList: [],
      saveBtnDisabled: false // 保存按钮是否禁用
    };
  },

  created() {
    //获取路由的路径参数值
    if (this.$route.params && this.$route.params.id) {
      this.courseId = this.$route.params.id;
      this.chapter.courseId = this.courseId;
    }
    // 获取章节小节列表
    this.getChapterVideo();
    console.log("chapter created");
  },

  methods: {
    // 点击确认调用
    handleVodRemove(){
      // 调用删除视频的接口
      videoApi.deleteAliyunvod(this.video.videoSourceId)
        .then(response=>{
          this.$message({
            type: "success",
            message: "删除视频成功"
          });
          // 因为就只能传一个文件，清空文件列表
          this.fileList = [];
          //防止把已经删除的视频id和视频名称存库
          this.videoSourceId =''
          this.videoOriginalName=''
        })
    },
    // 点击×调用
    beforeVodRemove(file,fileList){
      return this.$confirm(`确定移除 ${ file.name }？`);
    },
    handleVodUploadSuccess(response, file, fileList){
      this.video.videoOriginalName = file.name;
      console.log('****上传文件****' +file.name);
      this.video.videoSourceId = response.data.id;
    },
    handleUploadExceed(){
      this.$message.wraning('想要重新上传视频，请先删除已上传的视频')
    },
    //=====================小节操作=============================//
    //打开编辑小节弹窗
    editVideoDialog(id) {
      this.dialogVideoFormVisible = true
      videoApi.getVideoInfo(id).then(response=>{
        this.video = response.data.video
        //this.fileList=[this.video.videoOriginalName]
      })
    },
    //打开添加小节弹窗
    openVideoDialog(id) {
      this.fileList=[],
      this.video = {};
      this.dialogVideoFormVisible = true;
      this.chapterId = id;
      this.video.courseId = this.courseId;
      this.video.chapterId = this.chapterId;
    },
    saveOrUpdateVideo() {
      this.saveVideoBtnDisabled = true;
      if (this.video.id) {
        this.updateVideo();
      } else {
        this.addVideo();
      }
    },
    // 删除小节
    removeVideo(id) {
      this.$confirm("此操作将删除章节，是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        //点击确定，执行then方法
        //调用删除方法
        videoApi.deleteVideoInfo(id).then(response => {
          this.$message({
            type: "success",
            message: "删除小节成功"
          });
          this.getChapterVideo();
        });
      });
    },
    //添加小节
    addVideo() {
      console.log(this.video.courseId);

      videoApi.addVideoInfo(this.video).then(response => {
        // 关闭弹框
        this.dialogVideoFormVisible = false;
        // 提示信息
        this.$message({
          type: "success",
          message: "添加小节成功"
        });
        // 刷新页面
        this.getChapterVideo();
        //恢复按钮状态
        this.saveVideoBtnDisabled = false;
      });
    },
    //修改小节
    updateVideo() {
      videoApi.updateVideoInfo(this.video).then(response => {
        this.dialogVideoFormVisible = false;
        this.$message({
          type: "success",
          message: "修改小节成功"
        });
        this.getChapterVideo();
        //恢复按钮状态
        this.saveVideoBtnDisabled = false;
      });
    },
    //=====================章节操作=============================//
    // 删除章节
    removeChapter(id) {
      this.$confirm("此操作将删除章节，是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        //点击确定，执行then方法
        //调用删除方法
        chapterApi
          .deleteChapterInfo(id)
          .then(response => {
            this.$message({
              type: "success",
              message: "删除章节成功"
            });
            this.getChapterVideo();
          })
          .catch(error => {
            this.$message({
              type: "error",
              message: error.message
            });
            this.getChapterVideo();
          });
      });
    },
    // 编辑章节时弹出对话框并回显
    editChapter(id) {
      chapterApi.getChapterInfo(id).then(respose => {
        this.chapter = respose.data.chapter;
        this.dialogChapterFormVisible = true;
      });
    },
    // 添加章节时弹出对话框
    openChapterDialog() {
      this.dialogChapterFormVisible = true;
      this.chapter.title = "";
      this.chapter.sort = "";
    },
    // 添加或修改章节
    saveOrUpdate() {
      this.chapter.courseId = this.courseId;
      if (this.chapter.id) {
        this.updateChapter();
      } else {
        this.addChapter();
      }
    },
    // 修改章节
    updateChapter() {
      chapterApi.updateChapterInfo(this.chapter).then(response => {
        //1.关闭弹框
        this.dialogChapterFormVisible = false;
        //2.提示信息
        this.$message({
          type: "success",
          message: "修改章节成功"
        });
        //3.刷新页面*
        this.getChapterVideo();
      });
    },
    //添加章节
    addChapter() {
      chapterApi.addChapterInfo(this.chapter).then(respose => {
        //1.关闭弹框
        this.dialogChapterFormVisible = false;
        //2.提示信息
        this.$message({
          type: "success",
          message: "添加章节成功"
        });

        //3.刷新页面*
        this.getChapterVideo();
      });
    },
    getChapterVideo() {
      chapterApi.getAllChapterVideo(this.courseId).then(response => {
        this.chapterList = response.data.allChapterVideo;
      });
    },
    previous() {
      console.log("previous");
      this.$router.push({ path: "/course/info/" + this.courseId });
    },

    next() {
      console.log("next");
      this.$router.push({ path: "/course/publish/" + this.courseId });
    }
  }
};
</script>

<style scoped>
.chanpterList {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li {
  position: relative;
}
.chanpterList p {
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #ddd;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.videoList {
  padding-left: 50px;
}
.videoList p {
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #ddd;
}
</style>